Looks like we get a build failure if IPV4=n and ETHTOOL_NL=y because the code unconditionally references the udp tunnel ops from the ethtool tunnel stuff.
- [PATCH net-next v2 04/10] ethtool: add tunnel info inter... Jakub Kicinski
- Re: [PATCH net-next v2 04/10] ethtool: add tunnel i... kernel test robot
- [PATCH net-next v2 08/10] ixgbe: convert to new udp_tunn... Jakub Kicinski
- [PATCH net-next v2 06/10] selftests: net: add a test for... Jakub Kicinski
- [PATCH net-next v2 10/10] mlx4: convert to new udp_tunne... Jakub Kicinski
- Re: [PATCH net-next v2 10/10] mlx4: convert to new ... Tariq Toukan
- Re: [PATCH net-next v2 10/10] mlx4: convert to ... Tariq Toukan
- Re: [PATCH net-next v2 10/10] mlx4: convert... Jakub Kicinski
- [PATCH net-next v2 01/10] debugfs: make sure we can remo... Jakub Kicinski
- [PATCH net-next v2 07/10] ixgbe: don't clear UDP tunnel ... Jakub Kicinski
- Re: [PATCH net-next v2 00/10] udp_tunnel: add NIC RX por... David Miller
- Re: [PATCH net-next v2 00/10] udp_tunnel: add NIC R... Jakub Kicinski
- Re: [PATCH net-next v2 00/10] udp_tunnel: add NIC RX por... Tom Herbert
- Re: [PATCH net-next v2 00/10] udp_tunnel: add NIC R... Jakub Kicinski
